Accession Number : ADA193207

Title :   Effect of Thermal Treatment on the Mechanical and Toughness Properties of Extruded Sic sub w/Aluminum 6061 Metal Matrix Composite.

Descriptive Note : Final rept.,

Corporate Author : NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD

Personal Author(s) : Hasson, D F ; Hoover, S M ; Crowe, C R

PDF Url : ADA193207

Report Date : 31 Jan 1987

Pagination or Media Count : 30

Abstract : Mechanical, instrumented Charpy V-notch (CVN) energy and plane strain fracture toughness properties of SiC whisker reinforced 6061 aluminum metal matrix composite material from an extruded tube have been determined. The effect of thermal treatment and orientation have been studied. The mechanical strength properties are higher than wrought Al 6061 in the T6 condition. CVN energy values, however, were reduced by an order of magnitude Kic fracture toughness of the as-received, T6 and degassed + T6 thermal treatments were 50% of the wrought Al 6061 alloy. The effect of orientation showed that the orientation with the least amount of SiC whisker in the crack plane (i.e., greatest mean free path between reinforcements) yields the highest toughness value. Keywords: Mechanical strength properties, Thermal treatments, Charpy V-Notch, Toughness behaviors.

Descriptors :   *FRACTURE(MECHANICS), *STRENGTH(MECHANICS), *TOUGHNESS, *METAL MATRIX COMPOSITES, CRACKS, ENERGY, EXTRUSION, HEAT TREATMENT, MEAN FREE PATH, MECHANICAL PROPERTIES, TUBES, VALUE, SILICON CARBIDES, ALUMINUM ALLOYS, WHISKER COMPOSITES, CHARPY IMPACT TESTS

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE